The goal of the present work was the design and experimental validation of a simple plug & play programmable sensor-to-��C interface able to self-configure its operation following Inhibitors,Modulators,Libraries when adapting the output of different sensors, optimizing every sensor span. The proposed Smart Transducer Interface Module (STIM) includes both electronic and software elements. The hardware module consists of an electronic system that transforms the output of resistive sensors and sensors with voltage/current output to a quasi-digital signal compatible with the electrical levels of the digital input ports of the low-power ��C in the sensor node, thus allowing easy reading [5]. This electronic interface system can be reprogrammed according to the electrical characteristics Inhibitors,Modulators,Libraries of the connected sensor so as to achieve an optimum sensor reading performance.
This is done by the software module, implemented into a small auxiliary ��C which adjusts the programmable electronics to optimize the conditioning circuit operation and coordinates the measurement process managing Inhibitors,Modulators,Libraries the resources involved in the operation. The information to properly configure the hardware module and recover the value of the measured magnitude from the sensor reading is contained in a small flash memory in this auxiliary ��C. In addition, the proposed interface is plug & play (P&P), containing all the required information for configuration when it is plugged into the master ��C of the sensor node, self-configuring its operation without user interaction.The paper is organized as follows. Section 2 describes the proposed smart transducer interface design.
Section 3 explains the software design for the conditioning and communications processes, Inhibitors,Modulators,Libraries including the final frequency to code Carfilzomib conversion performed in the master ��C. Section 4 shows the system implementation and analyses power consumption in a wireless sensor node. Section 5 presents the application of the proposed system as an interface for some low-voltage sensors, in particular for a temperature dependent resistor (NTC), a humidity dependent resistor (RH sensor), a linear Hall sensor, a light dependent resistor (LDR) and a photodiode. Finally, conclusions are drawn in Section 6.2.?STIM Electronic InterfaceThe proposed sensor interface can accommodate resistive sensors and sensors with voltage/current output. In addition, it is compatible with the needs and restrictions of the nodes of a wireless sensor network: low-voltage, to be powered with low form factor batteries; minimum power consumption, to optimize the node selleck chem life; and low-cost, to minimize the total cost for WSN applications involving a high number of nodes spread out over large areas.A simplified diagram of the interface circuit is shown in Figure 1.